Method scale

arrow-array/src/array/primitive_array.rs:1701–1745

Returns the decimal scale of this array

(&self)

    /// Returns the decimal scale of this array
    pub fn scale(&self) -> i8 {
        match T::BYTE_LENGTH {
            4 => {
                if let DataType::Decimal32(_, s) = self.data_type() {
                    *s
                } else {
                    unreachable!(
                        "Decimal32Array datatype is not DataType::Decimal32 but {}",
                        self.data_type()
                    )
                }
            }
            8 => {
                if let DataType::Decimal64(_, s) = self.data_type() {
                    *s
                } else {
                    unreachable!(
                        "Decimal64Array datatype is not DataType::Decimal64 but {}",
                        self.data_type()
                    )
                }
            }
            16 => {
                if let DataType::Decimal128(_, s) = self.data_type() {
                    *s
                } else {
                    unreachable!(
                        "Decimal128Array datatype is not DataType::Decimal128 but {}",
                        self.data_type()
                    )
                }
            }
            32 => {
                if let DataType::Decimal256(_, s) = self.data_type() {
                    *s
                } else {
                    unreachable!(
                        "Decimal256Array datatype is not DataType::Decimal256 but {}",
                        self.data_type()
                    )
                }
            }
            other => unreachable!("Unsupported byte length for decimal array {}", other),
        }
    }
}

#[cfg(test)]